Removes pinocchio flag from docs

[peterd-NV]

Description

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Fixes # (issue)

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (existing functionality will not work without user modification)
• Documentation update

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• I have read and understood the contribution guidelines
• I have run the pre-commit checks with ./isaaclab.sh --format
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• I have updated the changelog and the corresponding version in the extension's config/extension.toml file
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[greptile-apps]

Greptile Summary

Removed all occurrences of the deprecated --enable_pinocchio flag from command-line examples in the humanoids imitation learning documentation. This cleanup follows PR #4713 which removed legacy support for a custom-built version of pinocchio from the codebase, eliminating the need for the flag.

Confidence Score: 5/5

• This PR is safe to merge with no risk
• Documentation-only changes that remove a deprecated flag consistently across all examples, with no logical errors or implementation risks
• No files require special attention

Important Files Changed

Filename	Overview
docs/source/overview/imitation-learning/humanoids_imitation.rst	Removed deprecated --enable_pinocchio flag from all command examples (19 occurrences) following removal of the flag in codebase

_{Last reviewed commit: 9c814ec}

[greptile-apps]

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